O&k Orenstein & Koppel Aktiengesellschaft

Hans Jurgen Schumacher

Uwe Rathje

An adjusting device for the main shield of a grader in which two lifting cylinder, a sideways adjusting cylinder and two pivot arms interconnected by an arresting bridge for actuating the main shield are by the arresting bridge linked to a bridge frame of the grader which bridge frame has a rectangular cross section. Each of the two pivot arms are arranged for pivoting about two joints while one of the pivot arms has its free end provided with fulcrums arranged asymmetrically with regard to the vertical axis of symmetry for establishing linkage connection with one lifting cylinder and a sideways adjusting cylinder. The other one of the two pivot arms is at its free ends provided with a fulcrum for establishing linkage connection with the other lifting cylinder. The arrangement is such that one joint each serves for journalling the pivot arms on a front wall fixedly connected to a frame member of the grader and to the back wall likewise fixedly connected to the frame member, whereas another joint edge serves for journalling the pivot arms on the movable arresting bridge. The quadrangular joint structure comprising the above mentioned four joints is non-symmetrically arranged with regard to the axis of symmetry of the vehicle frame member and is displaceably arranged in the vertical plane.

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Dortmund-Asseln, Germany

Hans Jurgen Schumacher